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Finding the Fourth Proportional to 469.94, 648.42 and 283.46

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Solution

The fourth proportional to 469.94, 648.42 and 283.46 is: 391.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.94 : 648.42 = 283.46 : x
  2. Step 2: Convert to fraction form
    469.94/648.42 = 283.46/x
  3. Step 3: Cross multiply
    469.94x = 648.42 × 283.46
  4. Step 4: Simplify right side
    469.94x = 183,801.13
  5. Step 5: Solve for x
    x = 183,801.13/469.94
  6. Step 6: Final answer
    x = 391.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.